<template>
  <el-container class="home-container">
    <!-- 头部 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button @click="logout" type="info">退出</el-button>
    </el-header>
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="togleCollapse">| | |</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="409FFF"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active='activePath'>
          <!-- :unique-opened="true"->只允许展开一个菜单 -->
          <!-- :collapse-transition="false" -> 关闭动画 collapse是否折叠-->
          <!-- router -> 导航开启路由模式 是否使用 vue-router 的模式，启用该模式会在激活导航时以 index 作为 path 进行路由跳转-->
<!--          一级菜单-->
          <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
<!--            一级菜单的模板区域-->
            <template slot="title">
<!--              图标-->
              <i :class="iconObj[item.id]"></i>
<!--              文本-->
              <span>{{item.authName}}</span>
            </template>
<!--          二级菜单-->
          <el-menu-item :index="chirditem.path" v-for="chirditem in item.children" :key="chirditem.id"
          @click="saveNavStatus(chirditem.path)" >
            <template slot="title">
<!--              图标-->
              <i class="el-icon-menu"></i>
<!--              文本-->
              <span>{{chirditem.authName}}</span>
             </template>
          </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 内容主体 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>
<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menuList: [],
      iconObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      isCollapse: false,
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      // 清空token
      window.sessionStorage.clear()
      // 重定向到login
      this.$router.push('/login')
    },
    // 获取请求菜单
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
      // console.log(res)
    },
    togleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存导航路径
    saveNavStatus(activePath) {
      // alert(activePath)
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>
<style lang="less" scoped>
  .home-container {
    height: 100%;
  }
  .el-header {
    background-color: #373f41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div {
      display: flex;
      align-items: center;
      img {
        height: 40px;
      }
      span {
        margin-left: 15px;
      }
    }
  }
  .el-aside {
    background-color: #333744;

    .el-menu {
      border: none;
    }
  }
  .el-main {
    background-color: #eaedf1;
  }
  .iconfont{
    margin-right: 10px;
  }
  .toggle-button {
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    // 鼠标放上去变成小手
    cursor: pointer;
  }
</style>
